printk and kernel log

[Mulyadi Santosa]

On Mon, Jun 24, 2013 at 4:49 PM, Kevin Wilson <wkevils at gmail.com> wrote:
> Hi,
> When I add printk messages, and then try
> to read /var/log/messages,
> I see this:
>
> Jun 24 03:43:06 localhost kernel: [ 1858.148661] in my_func1
> Jun 24 03:44:03 localhost kernel: [ 1915.150953] in my_func2
>
> What are the numbers is square brackets  ?  like [ 1858.148661]
> or [ 1915.150953] ?

IIRC, they are jiffies a.k.a timer clock. It is incremented every 1/HZ
second. Major distros usually use HZ=1000 these days.

Looking at kernel config, I believe this parameter is the one that
toggle that timestamp:
CONFIG_PRINTK_TIME=y

So changing it to N and recompile the kernel should get rid of it.

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
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